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If anyone has any suggestions or links, I'd be truly grateful. The brightness is not working, the screen stays at maximum brightness.

Thank you for your help. I followed the instructions from the link below and now the brightness adjustment works.

Jefe
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  • Welcome to Ask Ubuntu! ;-) Could you please give us a bit more information like: Is it too dark? Is it too bright? What's the output of ls /sys/class/backlight/ Please [edit] your question and add this information... – Fabby Jun 27 '15 at 23:58
  • This works when typed exactly as directed:

    http://askubuntu.com/questions/604869/brightness-doesnt-work-on-acer-aspire-4741

    http://askubuntu.com/questions/604869/brightness-doesnt-work-on-acer-aspire-4741

     – Jefe Jun 29 '15 at 00:14

1 Answers1

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See https://askubuntu.com/a/604913/50254

Basically, do following:

 sudo nano /usr/share/X11/xorg.conf.d/20-intel.conf

Add following lines

Section "Device"
        Identifier  "card0"
        Driver      "intel"
        Option      "Backlight"  "intel_backlight"
        BusID       "PCI:0:2:0"
EndSection

Save (CTRL+X) and reboot the system. Function keys plus arrows should now correctly adjust the backlight and you have 20 possible levels instead of only 4 levels supported by BIOS.

Community
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Mikko Rantalainen
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